Journal
CORROSION SCIENCE
Volume 156, Issue -, Pages 16-31Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.04.043
Keywords
Stainless steel; Supercritical carbon dioxide; High-temperature corrosion; Oxide layer
Funding
- Engineering Research Center Program of MSIP/NRF of Rep. of Korea [2016R1A5A1013919]
- Sichuan Science and Technology Program of P. R. of China [2018JY0155]
- BK-Plus Program of the MSIP/NRF of Rep. of Korea
- China Scholarship Council
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The corrosion behavior of four stainless steels (SSs) with similar chromium content was investigated in supercritical carbon dioxide environment. Overall, weight gain was the smallest for 630 SS which formed thin and continuous Cr-rich oxide layer. Due to large Mn3O4 nodules, weight gain was larger for 430 SS. For 347H and 316LN SSs, thick duplex oxide layers were formed following the extensive oxide spallation, resulting in much greater weight gains than 430 and 630 SSs. The oxide spallation was explained by the formation of Nb-rich layer or amorphous matters at the matrix/oxide interface as well as the matrix structure.
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